<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>第一个HTML页面</title>
</head>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        自定义表单验证:
        <!--<form name="f" action="/login" method="post">-->
        <form name="f" action="/authentication/form" method="post">
            <br/>
            用户名:
            <input type="text" name="username" placeholder="name"><br/>
            密码:
            <input type="password" name="password" placeholder="password"><br/>
            <input name="submit" type="submit" value="提交">
        </form>
    </body>
</html>